Elements of Unsaturation A saturated hydrocarbon:CH2n+2 。 Each pi bond (and each ring)decreases the number of H's by two. Each of these is an element of unsaturation. To calculate:find number of H's if it were saturated,subtract the actual number of H's, then divide by 2. > Chapter 7 7 Chapter 7 7 Elements of Unsaturation • A saturated hydrocarbon: CnH2n+2 • Each pi bond (and each ring) decreases the number of H’s by two. • Each of these is an element of unsaturation. • To calculate: find number of H’s if it were saturated, subtract the actual number of H’s, then divide by 2. =>